Page 1 - Reviews - Nutricost, Caffeine , 100 mg , 500 Capsules - iHerb

Customer Ratings & Reviews

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4.8
Based on 565 ratings
486
50
17
5
7
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iHerb customer
Gold
Posted on Sep 6, 2025
United States
350
0
1
160
Simple, Effective Morning Boost
Verified purchase
I usually drink a sports drink in the morning, but when it isn’t naturally caffeinated, I take one of these capsules and it works perfectly. 100 mg is enough to wake me up without feeling jittery. I also keep a few on hand for a quick pick-me-up later in the day if I don’t have access to a caffeinated beverage. The capsules are easy to swallow and convenient to carry around.
iHerb customer
Posted on Sep 4, 2025
United States
23
0
0
2
it's caffeine
Verified purchase
the caffeine pills are odorless, flavorless, and easy to consume; the dosage is equivalent to a cup of coffee. It took about 30-45 minutes to hit my system, and I used that energy to do yard work. The energy lasted me about 4-6 hours, and i didnt have a crash. It was very helpful and much more potent than an energy drink. I can definitely see these being useful for working out or replacing a morning coffee. It was as advertised which resulted in being energized for my tasks.
monaeem
Silver
Posted on Jan 20, 2026
United Arab Emirates
160
0
0
112
night shifts
Verified purchase
Powerful stimulant that increases alertness and focus, boosts energy and reaction time, enhances workout performance and endurance, improves strength and power output, supports fat burning and metabolism during diet phases, reduces perceived effort and fatigue during training, supports mental clarity and motivation, bitter taste in powder form but tasteless in capsules, easy to supplement, and typically formulated as pure caffeine anhydrous or from natural plant sources. Amazing if u don't like coffe
iHerb customer
Silver
Posted on Sep 26, 2025
Saudi Arabia
123
0
0
3
This is a game-changer
Verified purchase
It’s pure magic! It’s the life hack I didn’t know I really need For someone who doesn’t really enjoy the taste of a cold brew or a cup of a V60, andd would really do everything possible to avoid teeth staining.. this is the game-changer
iHerb customer
Posted on May 16, 2026
Poland
2
0
0
0
Proper dose
Verified purchase
Finally found a brand which offers caffeine supplement with 100 mg in each dose. Other brands usually offer 200 mg which is way too high for me.
Matei03
Posted on Nov 17, 2025
Spain
45
0
2
5
Best energizer before gym
Verified purchase
Because I wanted something better for gym energy, I found this great caffeine supplement and all I can say is that after two pills I hit the gym and all day I had full energy without those spikes you get from drinking coffe
iHerb customer
Posted on Oct 30, 2025
Poland
29
0
3
5
Simple and Effective Energy Support
Verified purchase
These caffeine capsules are very convenient for a clean and predictable boost in alertness. No sugar or added ingredients — just a reliable dose when I need extra focus. Easy to control the amount and avoid too much coffee. Great value for daily use.
iHerb customer
Gold
Posted on Oct 29, 2025
Philippines
1,088
0
0
14
Verified purchase
great quality product. it really works as intended. Will definitely get more soon! Thank you so much for this. it was made of high quality ingredients. . over all good quality.Works really well and im looking forward to purchasing another one!
iHerb customer
Gold
Posted on Oct 29, 2025
Philippines
1,088
0
0
14
Verified purchase
great quality product. it really works as intended. Will definitely get more soon! Thank you so much for this. it was made of high quality ingredients. . over all good quality.Works really well and im looking forward to purchasing another one!
iHerb customer
Posted on Oct 10, 2025
Thailand
8
0
0
1
ยอดเยี่ยม!
Verified purchase
The price is very good value for the ingredients, good quality and large quantity.Large size, provides a large dosage of ingredients good benefits plain taste good for workout nice efficient cool package nice composition for routine nice results super energy for frequency workout